<div class="qrious">
  <p>
    基于<a href="https://github.com/neocotic/qrious" target="_blank">qrious</a>生成二维码。
  </p>
  <p>简单用法</p>
  <h2>{{ type }}</h2>
  <canvas id="qr"></canvas>
  <div style="margin:20px 0">
    <button *ngFor="let t of types" nz-button (click)="change(t)">{{ t }}</button>
  </div>
</div>
